deb http://www.lievin.net/downloads/debian/i386 stable main non-free
deb-src http://www.lievin.net/downloads/debian/i386 stable main non-free

OR

deb http://www.lievin.net/downloads/debian/amd64 testing main non-free
deb-src http://www.lievin.net/downloads/debian/amd64 testing main non-free